# fmin, fminf, fminl

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< c‎ | numeric‎ | math

Defined in header ``<math.h>`` |  |
float fminf( float x, float y ); | (1) | (since C99)
double fmin( double x, double y ); | (2) | (since C99)
long double fminl( long double x, long double y ); | (3) | (since C99)
Defined in header ``<tgmath.h>`` |  |
#define fmin( x, y ) | (4) | (since C99)

1-3) Returns the smaller of two floating-point arguments, treating NaNs as missing data (between a NaN and a numeric value, the numeric value is chosen).
4) Type-generic macro: If any argument has type long double, `fminl` is called. Otherwise, if any argument has integer type or has type double, `fmin` is called. Otherwise, `fminf` is called.

### Parameters

x, y | - | floating-point values

### Return value

If successful, returns the smaller of two floating-point values. The value returned is exact and does not depend on any rounding modes.

### Error handling

This function is not subject to any of the error conditions specified in `math_errhandling`.

If the implementation supports IEEE floating-point arithmetic (IEC 60559),

- If one of the two arguments is NaN, the value of the other argument is returned
- Only if both arguments are NaN, NaN is returned

### Notes

This function is not required to be sensitive to the sign of zero, although some implementations additionally enforce that if one argument is +0 and the other is -0, then -0 is returned.

### Example

Run this code

    #include <math.h>
    #include <stdio.h>

    int main(void)
    {
        printf("fmin(2,1)    = %f\n", fmin(2, 1));
        printf("fmin(-Inf,0) = %f\n", fmin(-INFINITY, 0));
        printf("fmin(NaN,-1) = %f\n", fmin(NAN, -1));
    }

Possible output:

    fmin(2,1)    = 1.000000
    fmin(-Inf,0) = -inf
    fmin(NaN,-1) = -1.000000

### References

- C23 standard (ISO/IEC 9899:2024):

  - 7.12.12.3 The fmin functions (p: TBD)

  - 7.25 Type-generic math <tgmath.h> (p: TBD)

  - F.10.9.3 The fmin functions (p: TBD)

- C17 standard (ISO/IEC 9899:2018):

  - 7.12.12.3 The fmin functions (p: TBD)

  - 7.25 Type-generic math <tgmath.h> (p: TBD)

  - F.10.9.3 The fmin functions (p: TBD)

- C11 standard (ISO/IEC 9899:2011):

  - 7.12.12.3 The fmin functions (p: 258)

  - 7.25 Type-generic math <tgmath.h> (p: 373-375)

  - F.10.9.3 The fmin functions (p: 530)

- C99 standard (ISO/IEC 9899:1999):

  - 7.12.12.3 The fmin functions (p: 239)

  - 7.22 Type-generic math <tgmath.h> (p: 335-337)

  - F.9.9.3 The fmin functions (p: 466)

### See also

isless (C99) | checks if the first floating-point argument is less than the second (function macro)
fmaxfmaxffmaxl (C99)(C99)(C99) | determines larger of two floating-point values (function)
C++ documentation for fmin

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